I had c6 z06 brakes. Scott is right, the stock rotors are one piece cast parts that are super heavy. I never had a problem locking up the tires though, and the calipers are going to be enough for 95% people who run road courses. The only reason I switched to Wilwood brakes was because it wasn't really cost effective to buy aftermarket two piece rotors with a custom hat for a full floater axle.
Matt
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